EP1041209B1 - Product and procedure for fireproofing - Google Patents

Description

This invention relates to a product and its method for obtaining fire insulation.

According to the known technique especially on board ships where the insulation Firewall bridges and bulkheads is mandatory, the insulation is obtained by panels of insulating material.

The application of panels made of this material, according to the known technique, nevertheless has several disadvantages.

Since these known panels are not rigid and can not be trampled, they have the serious disadvantage that it is necessary to on the underside of the decks or on one side of the watertight bulkheads and fix them with needles to the structure that must be insulated; these needles, because of their welding interrupt the painting cycle anticorrosion, in addition they constitute conduction points of the heat and they therefore limit the insulation characteristics of these panels.

Another disadvantage of these known panels is due to the fact that they should be interrupted at any level of reinforcement the structure. For example in ships, there are elements making protruding from the lower surface of bridges, such as reinforcing beams structure and technical facilities such as piping and cable bundles fixed by flanges to the ceiling of the premises. These protruding elements must therefore be covered successively by one insulating coating to ensure continuous fire insulation like longed for.

In addition, since, according to the known art, the insulating material shall cover the metal structures to which they are attached by flanges, such as cable gutters, ventilation ducts and tubing and, since all these facilities are successively, mounted, dismantled, compressed, they hinder often the implementation of insulating panels causing breaks and repairs. All these disadvantages require a greater use manpower, and they are a waste of time and therefore costs higher.

Another disadvantage of known panels is the fiber suspension who will stay for a while in the workplace, released by the cutting of the panels during their implementation, for the adapt to the structure to be coated.

From US-A-2993016 is already known a product for an insulation firestop consisting of plaster, vermiculite or expanded perlite and additives. According to some embodiments, we find the presence of asbestos.

All these disadvantages have been eliminated by the product and the process application of this invention as defined by the appended claims.

This invention has the purpose of producing a coating or a layer footprint, having the expected characteristics of fireproof insulation.

For this purpose, a product has been studied capable of providing a light coating and non-combustible that can adhere well to steel supports, sheet metal galvanized, aluminum, cement, wood, faesite, plaster etc.

Un premier avantage est que le produit est appliqué déja mélangé avec de l'eau pour obtenir du mortier ayant la densité d'un commun mortier de ciment, ce qui donc élimine complètement les problèmes du milieu causés par l'émission de poussières et de fibres pendant l'application.

Un autre avantage est constitué par la mise en oeuvre très facile parce-que le mortier peut être appliqué comme une couche inférieure pour planchers ou comme un commun enduit, de façon simple, sur tout type d'ouvrage, même sur des coulisses ou des plis, de petites saillies , des conduites et d'autres éléments similaires.

The product object of this invention offers many advantages such as the following:

A first advantage is that the product is applied already mixed with water to obtain mortar having the density of a common cement mortar, which completely eliminates the environmental problems caused by the emission of dust and fibers during the application.

Another advantage is the very easy implementation because the mortar can be applied as a lower layer for floors or as a common coating, in a simple way, on any type of work, even on slides or folds , small projections, pipes and other similar elements.

The application is much easier than with the known panels, by example when it comes to ship decks, because the finished product forms a decking that can be applied to the deck surface and its weight and thickness characteristics are like those of the products known ordinary.

The implementation of the product according to this invention is absolutely independent of the installations, it does not cause any obstacle or overlaps like those deplored in the application of the known technique, but it allows easy simultaneous work.

Another advantage is of an economic nature because the implementation is easy and because we must not go back to work already done for the restore and / or for successive retouching.

Another advantage of the product according to the invention is that it does not offer only a fire protection, but also has features soundproofing and that it can be applied on the walls.

The product object of the invention is not only incombustible, but it also offers the advantages: to be inert, rot-proof, perfectly mold and bacteria resistant and there is no danger or risk to the worker.

The method of applying the product of this invention may be as follows:

The surfaces of the structure to be insulated must be pre-treated with a suitable product anticorrosive adhesion promoter, they must be free of grease, oil, dust and / or soil. Before the complete drying of the adhesion promoter product, it is necessary to apply a layer of the mortar as described above, on which is applied a fiberglass net that must be covered by another layer of mortar according to this invention.

After drying the mortar, the surface can be refinished with coating products (carpet, vinyl etc.) or with products waterproofing or embellished with common paints.

Fig. 1 montre en section une pièce de tôle d'un pont sur lequel deux couches de mortier et le filet interposé ont été appliqués;

Fig. 2 est une vue en plan d'une part du filet interposé.

All these advantages and others will be illustrated in the description of the following figures appended for explanatory purposes, without any limitation of use.

Fig. 1 shows in section a piece of sheet metal of a bridge on which two layers of mortar and the interposed net have been applied;

Fig. 2 is a plan view on the one hand of the interposed net.

In fig. 1 the deck plate is indicated by 10, 11 shows the double layer of mortar applied to the bridge, according to the invention. The mortar is constituted by the product of the invention premixed with water in equal parts by weight. The interposed net is indicated by number 12. The thin layer formed of the anticorrosive adhesion promoter product is indicated by 14.

FIG. 2 shows the meshes 13 of the net 12.

According to an exemplary implementation of this invention illustrated in FIG. 1 on the surfaces of the steel sheet 10 is applied a promoter product anti-corrosive adhesive 14 with the trade name "CORLATEX ADDITIVO PRIMER »150μ thick. This product can be applied by roll or projected.

When the surfaces are made of cement, wood, faesite or other similar materials, after having checked the absence of lamination on the dry and dusted surfaces, a thicker layer of the anticorrosive adhesion promoter product "CORLATEX ADDITIVO PRIMER" Should be applied (kg 0.1 / m ² ) to obtain stronger adhesion as well as to encompass any remaining dust.

The product which is the subject of the invention is advantageously constituted by sulphate hemihydrate 40% by weight of calcium silicates and calcium magnesium thermoexpansed at 10% by weight, from perlite to 48% by weight, and special additives at 2% by weight. whose adhesion promoter is an acrylic resin, the agent dispersant is sodium hexametaphosphate, the thickening agent is polysaccharide ether.

On the adhesion promoter 14 is applied a first layer A of mortar 11 and then a fiberglass net 12 and then the second layer B mortar.

The total thickness of the mortar layer 11 depends on the degree necessary protection and it can vary from 10 to 35mm.

In the illustrated example the total thickness of 20mm. has been extended two equal layers of 10mm. each to provide protection type A60, ie for the duration of 60 minutes according to the international standards.

To apply the mortar 11 special machines to cut back can to be employed.

After application, the mortar 11 can be smoothed with a special spatula. The density of the dry product after its implementation is 495 Kg / m ³ , its thermal conductivity is 0.025 Kcal / mh ° C. After the application, the mortar is dry after 60 minutes and can be walked after 72 hours.

The characteristics of the raw net 12 100% fiberglass, can vary according to the necessities.

According to a preferred embodiment, its square meshes 13 consist of son spaced 3.5mm, perpendicular to each other, as shown in Figure 2, the net has a weight of 240 g / m ² and a thickness of 0.4 mm.

The minimum total number of threads in the longitudinal direction is 30 double threads per decimeter; in the transverse direction the minimum number total of threads is 27.5 threads per decimeter.

This invention includes all the variations of detail and the changes that may be obvious to the technicians of this branch, which do not go out of this invention but are included in the following claims.

Claims (8)

1. Product for fireproofing, characterized by the fact that it is constituted of plaster (calcium sulphate hemidrate), thermally expanded calcium and magnesium silicates, and of inorganic elements, such as pearlite, as well as of special additives consisting of adhesion promoting, dispersing and thickening agents, and characterized by the fact that such product is pre-mixed with water to produce mortar (11) designed to be applied on the work to be insulated (10).
2. Application procedure of the product according to claim 1, characterized by the fact that the mortar (11) is applied on the work to be insulated (10) in two layers (11A and 11B), by means of a coarse 100% glass fiber net (12) which is placed in between the two layers.
3. Application procedure of the product according to claim 1, characterized by the fact that the surfaces of the work to be insulated must be pre-treated with a corrosion-proof adhesion promoting agent (14).
4. Product for fireproofing according to claim 1, characterized by the fact that calcium sulphate hemidrate accounts for 40% of its weight, thermally expanded calcium and magnesium silicates account for 10% of its weight, pearlite for 48% of its weight, and special additives for 2% of its weight, that the adhesion promoting agent is an acrylic resin, the dispersing agent is sodium exametaphosphate, and the thickening agent is a polysaccharide ether.
5. Procedure according to claims 2 or 3, characterized by the fact that the 240 g/m² net (12) is 0.4 mm thick, that it consists of square meshes (13) formed by perpendicular wires with 3.5 mm center distance, that longitudinally there are 30 double wires per decimeter; and that transversally there are 27.5 wires per decimeter.
6. Procedure according to claims 2 and 3, characterized by the fact that the mortar (11) must be applied before the adhesion promoting agent (14) has fully dried up.
7. Procedure according to claim 2, characterized by the fact that the overall mortar (11A+11B) thickness may range between 10 and 35 mm.
8. Procedure according to claim 3, characterized by the fact that the corrosion-proof adhesion promoting agent (14) is applied with a 150 µ thickness on metal surfaces and that it is applied by an amount of kg 0.1/m² on porous surfaces such as concrete, wood, faesite, and other similar substances.

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